Oil-pump.



No. 825,548. PATENTBD JULY 10, 1906. H. L. LEILIGS a J. P. BURGER.

OIL PUMP.

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No. 825,548. PTBNTED JULY 10, 1966. H. L. LEILICH & J. P. BURGERl OIL PUMP.

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forces is foun and UNITED STATES PATENT oEEroE..

HENRY L. LELICH AND JOHN P. BURGER, OF DELPHOS, OHIO, ASSIGNORS TO THE DELPHOS CAN COMPANY, UF llELPHOS, OHIO, A CORPORA- TION OF OHIO.

OIL-PUMP.

No. 825,548. Specification of Letters Patent. Patented Juif; i, i906.

Applioetion flied November 2, l. Serial llo. 288,840.

of our puniY with portions thereof shown in section, an Fig. 6 is a side elevation of another modification of the invention with portiene thereof shown in section.

Referring to Figs. 1 and 2 of the drawins, 1

To @ZZ whom it mayconcern:

Be it known that we, HENRY L. Lennon and JoHN P. BURGER, citizens of the Suited' States, and residents of Del hos, in theeeunty of Allen and State of Ohio, eve invented eer--V tain new and useful improvements in Oil- Pumps; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it eppertains to make and use the same, reference being had to the accompanying drawings, and to the figures and letters of reference marked thereon, which form a part of this specification.

Our invention relates to improvements in dispensing-pumps of the cless commonly elnplo ed in conjunction with oil-cans or other taillis for discharging the liquid contents thereof into a receiving vessel, and has especial reference to improvements in the construction of pump described and shown in ou:` joint ap hcation iiled November 15, 1905, being SerieFNo. 287,430.

The object of our invention is the provision of s. pump of the non-overlowtype, which is so constructed that a suction is created through the return-tube et each downand up stroke of the iston-rod, while the expelling force throng the dischar e-tube is only created durin one direction o movement of the piston-ro thereby causing the returning or suction force of the pump to be more owerful than is its discharging or expelling lhrce during a single operetion or up and down stroke of the iston-rod, which relation of cl) to be necessary in the handling of oils or other liquids of a heavy nature b a pump of this class to efeetuall prevent tlie overflow of such liquids from tlie receivvessel. o this end the invention consists of certain novel features of construction, combination,

arrangement of the parte, as wili hereinagiter be more fully described and finally claimed.

In the accom anying drawings, forming part of this spec' cation, Figures and 2 are different side elevetions of one form of pum embodying our invention with portions thereof shown 1n section to disclose the operetive arts. Fig. 3 is e section of the nozzle ecm'- Eining the spo-uta of the dischar e and return tubes of the pump. Figs. 4 an 5 are dierent side elevations of a. modified construction represents the pump cylinder or barrel, w ich 'has its lower end provided with the usual foot-valve 2 and its top closed by a suitable oepiece 3, exoe t for an axial o ening therein, t rou h whio i the piston-ro 4, operating 'in the cy inder, extends. A valve-chamber 5 is formed at the up er end of the cylinder l immediately beiow t e cap-piece 3 and has an exit-opening 5a' in one side thereof anden inlet opening or port 5b in its bottom, through which the piston-rod 4 extends. Intermediete of the ends of the cylinder and dividing it into the two superimposed compartments 1El 1b is a valve-chamber 6, which has its side provided with en exit-openin 6a and its upper and lower ends, which are ormed b partitions 7 and S, respectively, provide with inlet openings or ports 7 and 8, respectively, through which the piston-rod extends.

Each chamber 5 6 is provided with a valve 9, which is iitted friction-ti ht to the pistonrod 4 and arrsn ed to play t erewith between the ends of its c iamber. These valves are in the form of a stiff disk of rubber, leather, or other suitable ecking material and are ade c ted'on the dldwnstroke of the piston-rod to c ose'the ports 5 and 8'* and open the port 7a in the respective chambers 5 6 and on the Vnpsn'oiie of said rod to open the ports 5a and 8 and close the port 7, The compartments laend il of the cylinder have their u per Vends-in communication throu h the me 'um of e tube or channel 1D, Win51 is formed in eny suitable ,manner exterior-ly of the o linder end is provided et its upper end with a port 10a, opening into the upper end of the compartment l a, and at its lower end with a port i0", opening into the upper part of the compartment 1b.

l1 and 12 re resent piston-heads which are carried by t e iston-rod 4 Within the com attinente 1* an 1b, respectively.

T e dsehar e-pi'peiS of the pum is connected to the ower art of the oy inder in. communication with t e compartment 1b and is provided with en outwerdl -opening checkva ve 14; The upper endo this pipe termi- 13, to w hich is connected natos in ra spout y i5 of the return-pipe 15,

the return-spout IQQ the latter being arranged close to and parallel with the discharge-tube for a portion of its length. This returntube is provided near its lower end with a branch 16, leading to the lower portion of the compartment 1a, and a branch 17, leading to the upper portion rof the compartment 1b, which branches are respectively provided with inwardly-opening check-valves 18 and 19, preferably of the bal type, the former of' which opens under conditions which serve to close the valve 14 in the discharge-pipe, while the latter opens under conditions which serve to open said valve 14. The operation of the pump is as follows: On the reciprocation of the piston-rod the lower iston-head 12 thereon operates on its upstro e to draw a quantity of -oil or other liquid into the lower compartment 1b of the umpcylinder and on its downstroke to orce the liquid from the cylinder through the discharge-pipe 13 and into the receiving vessel, into which the end of its spout projects. The piston 12 on its downstroke also operates to create a suction in the return-pipe 15 and is augmented in this operation by the downstroke of the piston 1 1 in the compartment 1 a, due to the communication between the upper ends of the compartments 1el and 1b through the tube or channel 10, thus on the downstroke of the piston -rod causing a more powerful suction throu h the return-pipe than the eduction simu taneously taking place through the discharge-tube. A further suction is created through the return-pipe 15 on the u stroke of the piston 1l, due to the valve branch 16, leading from the returnpipe and communicating with the compartment 1a adjacent its lower end, thus causing a substantially continuous suction to be created through the returnipe due to the alternate suction create through its branches 16 and 17 on the down and up strokes of the pistons. It will thus be apparent that as the liquid rises in the receiving vessel to a height sufficient to immerse the open end of the spout of the return-pipe the suction created through the return-pipe draws the surplus liquid in the vessel through the return-pipe and alternately through its branches 16 and 17 into the cylinder irst below the piston in the compartment 1a on the u stroke of the piston-rod and then above t e piston in the compartment 1b on the downstroke of the piston-rod, the liquid on the downstroke taking the course indicated by the arrows in Fig. 2. The liquid returned to the lower part of the compartment 1a on the upstroke of the piston is on the downstroke of said piston expelled therefrom through the port 7a and eXit-openin 6aL in the chamber 6, the valve 9 therein aving moved down with the piston-rod to uncover said port, while the liquid returned to the upper portion of the compartment 1b and through the tube 10 to the upper portion of the compartment l on the downstroke of the` pistons 11 and 12 is on the upstroke of said pistons expelled from the upper compartment through the port 5b and exit-opening 5 in the chamber 5 and Jfrom the lower comartment through the port 8 and exit-opening 61 in the chamber 6, the valves 9 in said chambers being moved by the piston-rod for th at purpose.

While the pump described in our application, Serial No. 287,430, works very satisfactorily in conjunction with the handling of heavy oils or liquids, the construction above described is found in practice to be more perfect and eiiicient in its operation of returning the surplus liquid in the receiving vessel to the can or tank from which discharged and entirely overcomes the objections incident to the handling of heavy oils with pumps of this class in which a single piston for both` discharging and returning the oil is employed.

In Figs. 4, 5, and 6 are shown similar constructions of pumps to that illustrated in Figs. 1 and 2, except that the tube 10 opening communication between the compartments 1a and 1b in Figs. 1 and 2 is eliminated, and Fig. 6 differs from Figs. 4 and 5 only in the construction and arrangement of its exitports for the returned liquid.

In Figs. 4 and 5, a represents the pumpcylinder; b, the upper and c the lower compartments therein, which compartments are shown in Fig. 4 as bein separated by a single partition d and in `ig. 5 as being separated by a suitable stuliing-box d; e, the piston-rod carrying the piston-head f in the upper compartment and the piston-head g in the lower compartment; i, the dischargepipe having the check-valve h therein; i, the return-pipe having the branch j, communicatin with the lower end of the compartment and provided with the inwardlyopening check-valve j', and the branch k, communicating with the u per end of the compartment c and provi ed with the inwardly-opening check-valve c; l and m, the valved exit-tubes leading from the lower end of the compartment b and the upper end of the compartment c, respectively, and n an opening in the upper end of the compartment b to permit the ingress and egress of air above the piston f as it is operated.

In Fig. 6, c represents the pump-cylinder; o and o, the superimposed compartments thereof; p, the exit-chamber interposed between the compartments o and o and havin communication through its ends with said compartments; g, the piston-rod, carrying the piston-head 1 in the compartment o', the piston-head s in the compartment o, and the friction-tight valve t in the exitchamber p; u, the discharge-pipe; v, the return-pi e havin the valved branches c and c, lea ing to t e compartments o and o, respective y, and w the opening in the upper IOO end of the compartment o to ermit the ingross and egress of air above t e piston 1 as it is operated.

It will be apperent in the o eration of tho two modified constructions cip the invention that each piston acts independently to create a suction in the return-pipe through the brunch thereof leading to its chamber and that the suction crested bythe lower piston on its downstroke is not augmented by the action of thc upper piston on its downstroke, due to the elimination of the tube 10 therefrom.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. A ump, comprising a. cylinder hsving a plura ity of superimposed compartments provided with exitopenings, e dischargepipc leading from one compartment, e return-pipe having communication with each compartment, and reciprocatory means operetive within the cylinder for creating an expelling force through the discharge-pipe in one direction of its movement and creating e.

' suction through the return-pipe in both dithrough Apiston-rod in the cylinder, and

rections of its movement.

2. A pump, con'iprising a cylinder having a plurality of compartments and en exit from each compartment, a discharge-pipe leading from one compartment, e. return-pipe having communication with each compartment, a

a piston cerried by the rod within each compartment for creating a discharging force through the diS- chergewipe during one direction of movement o the piston-rod und a suction through the returnpipe during both directions of movement of said rod.

3. A pump, comprisin cylinder having afoot-valve, a plurality o superimposed compsrtrnents, and a valved exit from each compartment, a discharge-tube leading from the ower compartment end having an out- Werdl Y-opening valve, e, retur -tube having branches leading to each compartment and provided with inwardlyopening valves, a piston-rod in the cylinder, and e piston carried by the rod Within each compartment whereby to cause an intermittent discharge the discharge-tube and a substantially continuous suction through the returntube during the operation of the piston-rod.

4. A pump, comprising a cylinder, having e foot-valve, two superimposed com ertments, and en exit-chamber interpose between the contiguous ends of the compartments and having ports communicating with each compartment, c discharge-tube leading from the lower compartment, a return-tube having communication with each compartment adjacent its exit-port, a piston-rod in the cylinder, a piston carried by the rod within each compartment whereby to cause en intermittent discharge through the dischargetube and c. substantially continuous suction through the return-tube durin the operation of the piston-rod, and e vellve mounted in the exit-chamber and operatively related to the piston-rod whereby the ports in the chamber will be alternately opened.

5, A pump, comprising a. cylinder having e plurality of communicating compartments provided with valved exit-openings, c discharge-tube leading from one compartment, a return-tube having vcommunication with each of the other compartments, a pistonrod in the cylinder, and a piston carried by the rod Within each compartment to effect a movement of the piston-rod and u suction through the return-tube during both directions of movement of the rod, the suction crested in one compartment being eugmented by that crested in the other compartments.

6. A pump, comprising a cylinder having two superimposed compartments communieating at their upper ends end each provided with exit means, a dischar e-tube leading from near the bottom of theower compartment, a returntube communicating with each com artment adjacent its inner end, a piston-ro in the cylinder, a piston carried y the rod Within each compartment to effect a discharge through the discharge-tube and a suction through the return-tube, substantially as described.

In testimony whereof We have hereunto signed our names to this specification in the presence of'two subscribing Witnesses.

HENRY L. LEILICH. JOHN P. BURGER. li tnesses M. WEGER, H. H. EMSHOFF. 

